Frost-resistant rechargeable battery Fenix 18650 with a capacity of 2900 mAh with protection. It was developed specifically for use in military and medical equipment that requires high durability.
You will appreciate this battery especially in winter, when it can operate reliably in extreme conditions even at temperatures well below freezing, down to -40°C.
The advantage of the Li-Ion battery is its high capacity and the fact that it almost does not suffer from self-discharge or memory effect.
The battery is equipped with protection against over-discharge, short circuit, overheating and high current load. If the electronic protection of the battery reaches its limit values, the cell is safely disconnected.